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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd3a091c3a11ac65352b71392153cd012bfc98f52b318f965ac1ca5ab9dd5e35d' 
  AND token = '7W7gI7xsp20eD3c1IOka4CYbEMZMXArjV2t3Sw4kTjs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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