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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11146c42409fe5d3824fb22317ddcd7c366ca4c006165a05e1567066f8b77540' 
  AND token = 'VBlCV9uewmUJiRj8jti2DCryEUt5kzV8A1Q+FJeR0Og=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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