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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '130f8e03099a9bdf88384e972b5708ea0e668ffe01c9e1f6e1ab0ac52b59b514' 
  AND token = 'R4VshGfhSDwxyp6C/D51fs5JygAi64RllJBq9Sxsmcc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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