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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36be6b8e84310efd254ac56419cc13df2fe02a29d6e70dfc39259e384aed0bb7' 
  AND token = 'Ax2fFpNJG4FhVhM8yOnhSNQ0lO6JzrtRmX7laQbFGF0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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