SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d05bac8b2b0a48bf8c13525b30556d0b0bbfa6cd1ccc921f51c3c55c4cf93a6' 
  AND token = 'Pz2nhCPQjRojipnPCMnbsd4v/N7/kUKIdiqBPbR4oQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables