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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '532696afac2aadef97adeebc060653903c4b0c96faaba9f8ca363a7bc1b3c5be' 
  AND token = '2ROj4lBp44nZxiAFiHPWl+GKJH0tIR7PaVrQyBofE20=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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