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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '067c8260b20ad82cd8e9aea54e7f3b31dd16301d4d13c307da9a411965e3c02a' 
  AND token = 'mV9eD6R0dM7LW1YIYpFO6XYlP6cceif1/abM45TxpC8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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