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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ba67aa92acba9148439c1c7452fbd4969a8647b8a09afaa7ae6681c700941565' 
  AND token = 'vR7FBUFSxdRObL7QyZoHV02vJ8ERek6/0Z+N1vil9q0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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