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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea80c5e1224360301ed9530c1ba9bb85d02b6bca9004843f7ba160bcb7318a13' 
  AND token = 'gT3smQCz4HM6WcEbhe7k4CViX+77H/foFRPs/SfJ3Ek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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