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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ada589d6995431f2c4811bb9f247039f4f66680ae759f518db089dd9fe040200' 
  AND token = 'ZT7xD6PqwNgjSLo+MoJXxryrAb6iNr9wddIOBQjbc/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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