SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25c327f3fed855246b2016910e55e35d0b22b724234b176bfa6218f9a347bf3e' 
  AND token = 'zoHTDdEMSKHAzel1SU4gANSHCNJtjKD58Rp+tOeIHdc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

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