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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b218dd9a812706a520ce6d280138bf4b8306dbc18f9cbef50412dea50cd4699d' 
  AND token = 'F6kK0v3CIfNDQ0kZ3pSsJgZt/j29yfZAni8M49V6QeA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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