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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '09c25a5527aa6f0613fbfef5530220d534c7ae8b97e93e8e531e214ffa6a950d' 
  AND token = '3J2cqkNHTBgCD06dvmKfIr23BIwFp/DM9tRYO2SjtjM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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