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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22f034c7f2118cc1660f92bc3304206c3d00443c040587760ce715cf190c861d' 
  AND token = 'FuMkrMfm7vS4dmpdmCDZq/c2elvmck4QN+Yaup4Ex+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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