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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d699afe02933f4572db6ae1cd7fb6f1c8de975e36eaf911acf8ef5a2e22e593' 
  AND token = 'Jib5yg9mf6fKWohJuC3JZqPMtvEKUGsltNVosABW8u8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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