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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17cfba111de489a00202d96782403c2839d20139fa075ee73b731659e72a5ac7' 
  AND token = 'kleSzERLVw2h0m19QW5ShR10U+PBUm48wlnJCULxN5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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