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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8bf3a668d041567829bb29d2bc8cb77f863313838eaf95f52dc76f56e52f7fa6' 
  AND token = 'jO2j2upoNJ5fx4kvEbxvW9xVwtNPPaxNw4zauEXYPSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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