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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '425a091c36bed4929b8b4cddf9879d66a5989c599850c05abc4d9765005eb182' 
  AND token = '0YZQXig0Di2gOOOEpAfoLbp7zlq8jZ86ssadM7ERCCw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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