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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e31779c68279c4bcd5519eb5f1bc4cbd716bfc0d7b5cdf3a03dfe2785b4e741' 
  AND token = 'VLgqdydFLUd8JDj9PWYjl4d3rC3qbuPBtmoH2bj0LKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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