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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2569d31f397091a3f2109bc4af2170a6af2eff8606d3a6e8a5044da8aea3d4a6' 
  AND token = 'ykwsz2Szq0RAiJnFe/e5k25wEa9+Nmy3DD8W9H5dH3w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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