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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69215e9098b9a946a52197cb65f6405dea54132faea52d5ab794c4dd8d558348' 
  AND token = 'dOtTLCiHnyF9+IIiAM1vHoc2eBBtI80i0jaXfwNrIVU=' 
  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"
    }
  }
}