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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07dd1cf1f799e691e5a168183f0d96ae6acd96f84c74560f48494bb36a4f237d' 
  AND token = 'BRc1Q/kUTZCLgz510yaME8GbnwPSyrSbD+d/BSlYoxY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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