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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '98054147185ddb785f174ebf5441d29635c20e2812ad799552a70051f4cdbd4d' 
  AND token = 'ZErRCpu+3NhhpStLn65Zw8atNzVG4r4WYb+27fnM/x4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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