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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3805c66e7da1eaa3be5db14ecdc7304527a260f095168a8ac61849df07cb8a8c' 
  AND token = 'IG/6DA8DSXxoehI0OV9mLcz3I7VJC4f7DQ2knVofuK8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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