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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1498283892ad87a91dab33d392c1fb8b73bee307132f9c363de6aee2045b6fc2' 
  AND token = 'QzXTtkvNrmo6oHerDp1kQiMYM2Bdj+3ikAwr7SOc/cU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.07397

JSON explain

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