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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a544986d5eeba98b45d26d193f221490d06c629d8a9cc8d16bc5af466c5f3512' 
  AND token = 'bhiwbsTRsecBwVwA0a2JocBmy04oiyAU3P2Q6URx8SE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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