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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'daa8ff062a6b20fec5c408950839ec882326c17cf8f4eb79da3f7585e0fdf11b' 
  AND token = 'eEQmaU7XC2V9REywlI9q+bXi7eTXPZAQ526Cw60vFRg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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