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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '160fb8d7cb83ee84df89a41afd2d47dd73edf465d916da2b3633163d6ffb676c' 
  AND token = 'uawtjipIPUNCI3fOhPMcWNL7DBHrHK3ESYrkbucrKn0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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