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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9fdc1126f087d78ad3ae5bbe30cb015a73172c2a2ff8d9783eca7f906edcaafa' 
  AND token = '7sft8KnG8XKP//By3FrO/K8Mkib4w8itnaNn7Jz0BIU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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