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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bab4e9d26402b9718e5389613c6630b93922dcab330e00f5080f50fcde7d05f6' 
  AND token = '8bNmgxvoynz7aLA5N3ZXvNs7qXs8oK4ymFK7xlEf7GQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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