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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b07e0ee72478621f78f1a64773320a95287a89376436ba605d5e199d170a4e69' 
  AND token = '+gfCiqh58BMewEq0TWlH4N2fqokhmGACT0AXPLYwRTY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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