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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2a0d1b09e38b4c82abc37f3482141f4630ba47ba0dcb2b1909b6a41571e7107e' 
  AND token = 'pA2/oa+6+c/50BR6vNKleZ57qY+agE4sxQ2XeCsoQRg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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