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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e570c73c796f45ef370dbd6ab17a750373d61ea0c64766b263ebc1664d25729' 
  AND token = '095LdX2RGJyTvNUy7MxGbSh02J4ryNjRhyJz2aRCV/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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