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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '62edfead6afc3ec0499ad87ea1cf275f9ce423dc949aa6c970352ff6632aead9' 
  AND token = 'SfyjHe68dmzbUuu31Zprw0xTPYD+l8gA/392SQT2A90=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}