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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '112058f77df22eaf243c36bb485af740aa8cd3b3e7e0637cbf700bb08b6c8a9c' 
  AND token = 'AygcmyasW3aGW54DNZ4klttF6Pny99E1r0SuIqk+Ja4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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