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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e56684c7b54777b6cd0eeec78aaa2157af6ac500b01e24cfd46333957e928ef4' 
  AND token = 'ADDdca0FVJEQ4YRYbs5TVwovYxcR2+VLIr49pDBstVY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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