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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'deb7df1c1034ba0e48bec9172ef2dd3be52f9c136f669afe5af7179a3f2d7d94' 
  AND token = 'f60FfeIJb+VyE3aJ/GW2xR/u+lzX7tpxNy/GHQtl3Tw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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