SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'f7a3b530475cc5256bf2041b499405614f59229e711a27aeb83ede414fe3f5b5' 
  AND token = 'k+lgInlCms81gfZuIfLVQHEHFLGbzBa5Ncu6XjZW5R4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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