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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1de32b82430b1b4ca849424cdecabc125a0574e5a85e081bbd7bbd15f3d7bcb2' 
  AND token = 'xiiBXl0CDw2uEXuGjV+gvOIm1obC7R0PQmUwwzBgN/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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