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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae91b0fbffd9e75228e378eb8c1a1125845a49bca54e3e4749c3378a8bbb3b65' 
  AND token = 'osj9SwtEk055fJRRB0DdTNSNyagbHOtHAGHKFRs2XPE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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