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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dc86e947223a3a2266480a31f4ef77b22862fa14993e01e146b51406d1b30848' 
  AND token = 'GWW0wUMmHz9mMwtT/krRnM1G64F0RQZFcWrZsnsAiCY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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