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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '34dae0ff12fe29c2f8923ac22b1b4af9fef152a9fc3bd9e03e6a4de6d45c51aa' 
  AND token = '0TdY40CKmdFPWKNDJkq8hTTFbuGrQhSnyZgBNpONW60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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