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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ef4b55394e9c40fefd51ddbeb89adca7d4c178be49b02d5ee0fad2e45c9a364' 
  AND token = 'dZ0oXqc8tSK+mYmhBa/Y/482AO+MkITcreIb9CrYjDs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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