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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f016ec67724f0937b2215538ca851c77a5418bb31299bbcf6094bf02d3877c75' 
  AND token = 'i35G6ILnzKCi2f87TcoONZzL/2aUOo5TH7DS3z6KUOw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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