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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '88748fc6316c9204badc9b2c5f9e9179e122027040cd5c91dea614625dd5be70' 
  AND token = 'ppFGB3D7/Xzuuho/I863PScE4wLzTsx/Al7gOQ71Fcc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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