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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '456f6a5798540a7f3b05ec4a7339914119f820957678f5b00af8ef5938e40159' 
  AND token = 'hGtN6kwkY9nquRWulakSP6x+65qryC59kRWdz6aUOwk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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