SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88c49876816b0fa36011d3eaff28f6e267108d6e61dc01839b6010da67365012' 
  AND token = 's7W+hNrFNOtl+Vf7AiBGLje+LqBZJZ1ps0d5YKHEvYE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

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