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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd5b6095f513e1d4aeef61e2c4446371391220ff008a1791cac17d143d00b2fc' 
  AND token = 'YOs2oK+5HHky8XJE4WSa72TTJZPd1Zr3rv9RdyxO2PI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}