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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '659a93213f20e2464c1cfc8c3920f796316c4e8700de0a499c15af6ae361fc55' 
  AND token = 'OD+SOsc7T+qHKYdxq47BzeKN4oXvPTG/feD4J4/FFyo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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