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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0472839a9c0f3db2e71c1106c300710b7d22f554749f3e650f0d648426ab2827' 
  AND token = 'BVAyK/m5gaMCoVDRTx5nzI9jyToYn0FsE0ILn/g3/jI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00115

JSON explain

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