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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07e8e706f2a0c750ed2562fbec4cf1e303b9bb777b5a9286c3fd63ac82df2524' 
  AND token = 'Ha1Tiv9kOwlrd3UbvTtfl6j3Qu8kgbjM6BBqyFL4IGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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