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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3b83328962d225dc86a2789e6188ec6efc628ddaf2317bd550d04f6c0877116' 
  AND token = 'q6odEWKFGuKoMZkr2gBc/WHIGP6tTOAjDHC6HTh2cJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}