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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14b04241355a11cac3804940ed8f83712f4a14a3bd151670cc4afb9973401a37' 
  AND token = 'hkoc1kVFpiSmzzSHuzYmixACjs6oicpE4zg3eJ953Ag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}