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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '8f93b2e2395ceb730da8fedd08be7d212160be692e5964d616352aa81e931762' 
  AND token = 'kE7KIGnozI380NpaGNbCUkkXBC3GgoNFk+O6i2OeBwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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