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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '606aed3a4555d7e3fb1c858c05afbe70157127b3075bdca8ef73f54c284aa360' 
  AND token = '22U1/Bb3FDe73owi3DuW0YKuQli0ggX3gtVuqZ80odY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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