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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '595660716a9d7e124e5030fd8f2714e8405817cc3efca5125d659c3a5780c965' 
  AND token = 'joMOzSUmIqWOslsoY6WzGXDi099CzFDDKrJJa666GDE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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