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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60e16e367b2938ca0f3e04706ceed765bdfdfb0b38bf1d5c6e27594ca975b1fb' 
  AND token = 'e7VLY8xvng4XYcp/ljAh6KOIBnAGL35XPMCyflBm4Wc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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